Loom



Aug. 11, I925 w. HARRIS LOOM Filed Dec.

WIT/W588 INVENTQH Wmm owns,

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Patented Aug. 11, 1925.

NET an it VIILLIAM HARRIS, OF PATERSON, NEW JERSEY.

LOOM.

Application. filed December 30, 1924.

To all whom it may concern:

Be it known that I, l VILLIAM HAinus, a citizen of the United States, residing at Paterson, in the county of Passaic. and State of New Jersey, have invented certain new and useful Improvements in Looms, of which the following is a specification.

In my application for patent Serial No. 739,044 I have set forth means for keeping taut that part of the sheet of warp and woven fabric in a loom which extends from the sand-roller to the cloth-beam, the same including the use of a. flexible tensioned connoction which in one form of the invention as disclosed in said application connected the sand-roller and cloth-beam and in another form connected the cloth-beam and warp-beam of the loom. The present invention consists in an improvement in the second of these two embodiments of the invention set forth in my said prior application, and it contemplates an arrangement of the said connection which will be least in the way of the weaver and the other parts of the loom, and, in the case where the connection is endless, a certain advantageous arrangement of said connection and means for controlling certain slack which in that case must be present.

The drawing is a side elevation of the loom embodying the present invention.

In the support 1 forming the loom frame is journaled the usual warp-beam 2 from which the sheet A of warp and'woven fabric extends forwardly over the breast-beam 3 and down to means which advances the sheet as the weaving proceeds and is here represented by the sand-roller 4 (driven in any suitable way), then around under the sand-roller and up over a guide-roller 5 journaled in links 6 pivoted in the support 1 and then down to the cloth-beam 7 on which it is wound.

The warp-beam and cloth-beam both have sprocket-wheels afiiXed thereto, designated 8 and 9, respectively.

A chain 10 is in tractive engagement with said sprocket-wheels and affords the mentioned tensioned connection. There are guides in the form of pulleys arranged as follows: a pair 11 above and somewhat forward of the warp-beam, one, 12, below the level of the cloth-beam and slightly forward of the pair 11, and another, 13, also below the level of the cloth-beam and slightly rearward thereof. The chain ex- Serial No. 758,823.

tends, as shown, in engagement with these guides and between the pair of guides 11 it has a depending bight or bend 10 and in this bight or bend, having running engagement with the same, is a weight-carrier 14 carrying one or more weights 15. (The part of the chain which supports the weightcarrier extends from the warp-beam and cloth-beam in such manner that it tends under influence of the weight to wind up the warp on the warp-beam and the cloth on the cloth-beam, acting therefore to keep the sheet A taut at all times, which is nevertheless free to be advanced as it is wound up by the sand-roller.) This arrangement of the connection and its guides economizes the space required for the connection and leaves the maximum clearance for the placement, movement and manipulations of other parts of the loom, and it has the further advantage that when the sheet A is to be set back, as in picking back, the weaver caneffect this by a pull on the part of the connection between guides 11 and 12 which is facile of accomplishment because it is downward.

The connection in the best form is end less as shown and further reaches from the warp-beam up over a pair of guides 16, between which it has a depending bight or bend 10 then downunder a guide 17 below the level of the guides-12 and 13 and then forward and under a guide 18, all these guides being also pulleys journaled in frame 1. A weight-carrier 19 is suspended in the bight or bend 10 and carries a weight 20. It will be seen that when the chain is endless there must be some slack therein to allow for the changing rates of rotation of the warpbeam and cloth-beam due to the wound masses thereon altering in diameter as the weaving proceeds, the portion or stretch of the chain which supports the weight-carrier 14 being taken up by sprocket-wheel 8 at an accelerating rate as the wound mass on the warp-beam decreases in diameter whereas it is delivered by sprocket-wheel 9 at a diminishing rate as the wound mass on the cloth-beam increases in diameter; it is to control this slack, therefore, that I provide the weight-carrier 19.

In the operation of the loom the weightcarrier 14 will rise due to the mentioned varying rates of rotation of the sprocketwheels 8 and 9, and in view of this I form one or both of the sprocket-wheels stepped as shown, whereby from time to time the weaver can change the chain from one to another step thus to delay the rise of the weight to an inoperative limit, and also permit keeping the tension uniform.

The advantages alluded to and involved informing in the connection an upwardly extending loop (having the bight 10) forward of the warp-beam are furthered where the connection is endless and the mentioned slack must be controlled if a loop representing such slack (and containing the bight 10 is arranged to extend upwardly rearward of the warp-beam, as shown and described.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is:

I. In a loom, the combination, with a support, means to supply the warp rotative on a horizontal axis, means to wind up the fabric end of the sheet of warp and woven fabric, and means to advance the sheet engaged therewith relatively between the first two means, of a pair of spaced guides arranged one forward of the other and both higher than the warp-supply means, other guides arranged at a lower level than any of said means, a flexible connection arranged in tractive engagement with said w 'arp-supply means and one of the other two {means and extending from the former relatively reversely to the direction in which the warp extends therefrom and then over the pair of guides and under the other guides and having a bight between said pair of guides, and a tensioning means for the connection engaged with said bight.

2. In a loom, the combination, with a support, means to supply the warp rotative on a horizontal axis, means to wind up the fabric end of the sheet of warp and woven fabric, and means to advance the sheet engaged therewith relatively between the first two means, of an edless flexible connection in tractive engagement with the warp-supply means and one of the other two means, means to guide said connection for travel lengthwise of itself supporting said connection with two loops extending upwardly from and one forward and one rearward of the warp-supply means and each with a dc pending bight therein, and tensioning means engaged with each bight.

In a loom, the combination, with a support, means to supply the warp rotative on a horizontal axis, means to wind up the fabric end of the sheet of warp and woven fabric, and means to advance the sheet engaged therewith relatively between the iirst two means, of a tensioned connection in tractive engagement with said war irsnpply means and one of the other two means and extending. from the former relatively reversely to the direction in which the warp extends therefrom, the part of that one of the two means with which said connection is engaged being stepped and said connection being shiftable from the one to the other of the steps.

4. In a loom, the combination, with a support, rotary means to supply the warp, rotary means to wind up the fabric end of the sheet of warp and woven fabric, and means to advance the sheet engaged therewith between the first two means, an endless flexible connection in tractive engagement with a rotary part of the winding-up means and a ro tary part of the warp-supply means, means to exert a tensioning force on that portion of the connection which connects said parts and extends from the second-n amed part relatively reversely to the direction in which the warp extends therefrom, and means to exert a lesser tensioning force on the other portion of said connection which connects said parts.

In testimony whereof I affix my signature.

WILLIAM HARRIS.

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